Anne Hathaway, Viola Davis and Tracee Ellis Ross are among the actors who've taken to social media to speak out about the death of the 18-year-old from Oakland, California, who was fatally stabbed on Sunday night.

In the days following 18-year-old Nia Wilson's death, Hollywood stars have taken to social media with messages of sadness, solidarity and calls for justice.

Wilson, a young black woman from Oakland, was fatally stabbed by a white man at the BART MacArthur Station on Sunday evening. Her sister, Latifah Wilson, 26, was also stabbed and hospitalized for her wounds, but has since been released.

On Wednesday, Anne Hathaway posted an impassioned response to Wilson's murder on Instagram, stressing the role that white people play in violence against black people in the United States.

"White people DO NOT have equivalence for this fear of violence," Hathaway wrote. "Given those givens, we must ask our (white)selves- how "decent" are we really? Not in our intent, but in our actions? In our lack of action?"

The man suspected of killing Wilson, 27-year-old John Cowell, was arrested by police on Monday evening. BART Police Chief Carlos Rojas described Cowell "as a violent felon who is currently on parole," and that the attack appeared to be "unprovoked" and "unwarranted."

"You as a person who is white in America can make the effort to understand the experience of those who are not, and be vocal about the truth," Browning wrote. "Be an ally. Be an amplifier."

Many stars, including Lena Waithe, Bruno Mars and Rose McGowan have posted photos and art of Wilson on their personal accounts, along with the hashtags #SayHerName and #JusticeForNia.

"Why do we have to die to become immortal?" Waithe tweeted.

Protests and rallies in Wilson's honor have been held in Oakland and other parts of California. In a recent analysis of homicide arrests, The Washington Post reported that black victims, who account for the majority of homicides, were the least likely of any racial group to have their killings result in an arrest.

"Tired of needing to organize rally's to convince people that our lives matter," actress Viola Davis tweeted. "To the killer...I will NOT say your name. To Nia...we will shout yours from the rooftops!!!"

Wilson was also a rapper. At a vigil on Monday, one of Wilson's sisters blasted her music for the crowd.

"Our bodies and our humanity deserve safety and joy," the Black-ish actress wrote alongside the video.

Singer and Oakland native Kehlani tweeted in response to Wilson's death on Monday, when the police manhunt for Cowell was still in progress.

"#BART manages to catch riders who haven't paid ticket fair, young graffiti artists, you can catch a murderer," the singer wrote, "give her family some peace and get a murderous white supremecist off of oakland streets."

Actress Sophia Bush affirmed Hathaway's words in an Instagram post yesterday, writing that violence against women is a societal issue all people must address.

"She is us." Bush wrote. "And violence against women of color needs to be called out by ALL of us."

You know.....at what point will it stop? I'm getting tired of the heartbreak. Tired of needing to organize rally's to convince people that our lives matter. To the killer...I will NOT say your name. To Nia...we will shout yours from the rooftops!!! pic.twitter.com/2i03JfCQgS